ILLUSTRATIONS. 



No. .Pa£« 



Trenton High Falls , . . . . Frontispiece. 



1. Fossil Bivalve— view of ventral valve , . ...... 14 



2. Fossil Bivalve— edge view of both valves 14 



3. Common River Mussel— vie w of left valve „ 14 



4. Common River Mussel— view of both valves along hinge line 14 



5. View of the Temple of Serapis at Puzzuoli in 1836 , , 20 



6. View of Graham's Island, July 18, 1831 23 



7. New Volcano of Santorin, 1S66 24 



8. Work of the Elements at Cape Stevens, Arctic Ocean 27 



9. Shore Erosion on the Mendocino Coast, California 31 



10. Fingal's Cave in Staffa 34 



11. Comparative Volumes of the gaseous and solid Earth 39 



12. The Solar System rotating in a gaseous state 43 



13. Primeval Wrinkles in the Earth's forming Crust 53 



14. The Primeval Storm 55 



15. Shore Erosion and distribution of Sediments 57 



16. Diagram of Chemical Reactions in the Primeval Ocean 61 



17. Structure of the oldest known Fossil 6S 



18. The Humblest of Living Creatures (Amoeba princeps) 70 



19. Disturbed Condition of Eozoic Strata 74 



20. The Germ of the North American Continent 74 



21. A St. John's Trilobite (Paradoxides Harlani) 76 



22. Cliffs of Potsdam Sandstone, New York 77 



23. A Potsdam Bivalve (Lingula prima) 79 



24. A Potsdam Bivalve (Lingula antiqua) 79 



25. Modern Lingulas anchored to a Support 79 



26. A Potsdam Trilobite (Dicellocephalus Minnesotensis) SO 



27. A Trilobite rolled up 80 



28. Eye of a Trilobite magnified 81 



29. A Potsdam Sea-weed (Palceophycus arthrophycus) 83 



30. Outlines of Lake Superior 84 



31. Section across Lake Superior S4 



32. The Miner's Castle, "Pictured Rocks," Lake Superior 86 



33. The Sail Rock, " Pictured Rocks," Lake Superior SS 



34. The Grand Portal, " Pictured Rocks," Lake Superior S9 



35. Camp on the Beach, near the Chapel 90 



36. The Chapel, "Pictured Rocks," Lake Superior 91 



37. Chapel Falls, "Pictured Rocks," Lake Superior 92 



38. Section across the Continent of North America 95 



39. Hydrographic and Orographic Outlines of North America 96 



40. A living Crinoid (Pentacrinus eaput-Medusce) 107 



41. A Trenton Trilobite (Asaphus gigas) 10S 



42. The Paper Nautilus (Argonauta Argo) 110 



43. Paper Nautilus with the arms spread Ill 



44. The Eight-armed Cuttle-fish 112 



45. A "Kraken Octopod" scuttling a Three-master 113 



46. The Pearly Nautilus {Nautilus piompilius) 114 



47. A Straight Chambered Shell (Ormoceras tenuifilum) 115 



48. A Coiled Chambered Shell (Trocholites ammo?iius) 115 



49- A Devonian Cephalopod (Clymenia SedgicicM) 116 



